Java - what does it do?

What is the advantage of using Java, and any advice for the software upgrade?
Thanks for any clear information.
PT

Welcome to Apple Discussions!
The advantage of upgrading Java is the ability to use some websites which require the latest version of Java be installed. Not all websites use Sun Java. Those that use Microsoft Java still have issues even with the latest Java update. If you see Applet loading on your browser's status bar, that's a Java applet that is starting up. If you are unable to get it to work, verify with the webmaster whether their Java is of the kind used by Apple, which is Sun Java, or whether they are using ActiveX based coding.

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